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'0'. G. OTIS. HYDRAULIC MOTOR."

No. $77,636:; Patented Feb. '7. 1888.

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NITED D STATES PATENT OFFICE.

CHARLES G. OTIS, OF BROOKLYN, NEW YORK.

HYDRAULIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 377,636, dated February7, 1888.

Application filed August 18, 1887. Serial No. 247,290. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES G. OTIS, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Hydraulic Motors, of which thefollowing is a specification.

This invention relates to improvements in hydraulic motors, as set forthin the following specification and claims, and illustrated in theaccompanying drawings, in which- Figure 1 is a side elevation, partly insection, of a conduit; Fig. 2 is a detail plan view of a casing and acut-out on a smaller scale than Fig. 1.

Si milar letters indicate corresponding parts.

In the drawings, the letter A indicates a receiver or tank from whichwater or fluid passes through the conduit B. A motor-wheel actuator ormotor, 0, is located in said conduit.

Said wheel is shown in the form of a bucketwheel, and is journaled at D,and a casing, E, partly surrounds said wheel. The shaft or axle of thewheel extends through said casing at D. A safety-valve, F, closes thespace in the case or air-chamber E.

G is a float-valve, and as the level'of the fluid rises in theair-chamber the float is actuated so as to open the valve and allowfluid to pass through the pipe N to the cylinder Hof the aircompressoror the air-pumping engine I. Said compressor is thus actuated and forcesair through the pipe K into the air-chamber E.

The device operates as follows: The water flowing through the conduit Bactuates the wheel 0. To secure efficient action of the fluid on thewheel, the fluid should not be allowed to rise above the shaft or axleof the wheel.

The compression of air in the chamber or case.

Eusually prevents such excessive rise of the fluid. In case the fluidshould rise beyond its proper level, such rise of the fluid will actuatethe float-valve G so as to open the passage N. Fluid will then passthrough said passage N into the cylinder H, so as to actuate the pistonin said cylinder, whereby the air-compressor I will be set in motion,and air will be forced through the passage K into the air chamber orcase E until the pressure of air in said case has forced the fluid downto its proper level. As the fluid descends the valve Ggradthrough thecut-out M, and the casing E is,

then free to be cleaned or otherwise attended to, as may be required.

It will be seen that by this invention I am enabled to run an undershotwheelin acharnber which contains air under pressure and is sealed by theliquid that actuates the wheel.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a hydraulic motor, thecombination of a conduit containing waterunder pressure higher than the atmospheric pressure, an air-. chambercontaining air under pressure equal to, the pressure of the water in theconduit and lower part of said, chamber, a shaft extending horizontallythrough the air-chamber at the level of the water, a verticalbucket-wheel engine communicating with the air-chamber,' substantiallyas described.

2. The combination, with the conduit containing water under pressurehigher than the atmospheric pressure, and with an air-chamber connectedto the conduit and containing air under pressure equal to the pressureof the mounted on said shaft, and an air-pumping water in the conduit,of an air-pumping engine, a pipe extending from said air-chamber intothe air pumping engine and through which power is transmitted to saidengine, and a valve for admitting Water to this pipe, substantially asdescribed. v

3. The combination, with the conduit con-,

taining water under pressure higher than the atmospheric pressure, andwith an air-chainber connected to the conduit and containing air under apressureequal to'the pressure of the water in the conduit, of anair-pumping engine, a pipe extending from said engine into theair-chamber, a pipe extending from said air-chamber into the air-pumpingengine and through which power is transmitted to said engine, and avalvefor admitting water tov this pipe, and afloat for controlling theposition of this valve, substantially as described.

around said chambers and connected with the conduit at each end,substantially as described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

CHARLES G. OTIS. 11. 8.]

Witnesses:

W. HAUFF, E. F. KASTENHUBER.

